I am unable to change the cost center when completing an expense. The drop down shows most common IDs I have used, otherwise I cannot find the cost center I am trying to charge to.
Cost Centers in Concur are located in a list that is maintained by your Accounting department. You should contact your local Concur administrator and find out why the cost center you need does not appear in the dropdown list. Perhaps is by design that the cost center does not allow allocation against their budget.
I hope this helps.